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Sebaceous cyst

  • Alternative Names

    Epidermal cyst; Keratin cyst; Epidermoid cyst


    The main symptom is usually a small, non-painful lump beneath the skin.

    If the lump becomes infected or inflammed, other symptoms may include:

    • Skin redness
    • Tender or sore skin
    • Warm skin in the affected area

    Grayish-white, cheesy, foul-smelling material may drain from the cyst.

    Signs and tests

    In most cases, your doctor can diagnose this type of cyst by simply examining your skin. Occasionally, a biopsy may be needed to rule out other conditions.